Fig. 1. Categorization of factors to assess establishment success of introduced species. Invasibility is defined as the characteristics of a habitat that makes it vulnerable to be invaded by introduced species. Invasiveness is defined as those characteristics or traits of introduced species that enable them to establish in a new area. Stochastic events are events that may or may not change invasibility and invasiveness affecting the establishment process. We predict the rate of successful establishment will increase at the mid-point where all three categories overlap. However, in the absence of stochastic events that would influence the establishment process, we may predict the success rate of establishment by assessing only the species' match in invasiveness with invasibility of the recipient ecosystem.